SENA Promi-SD 205 - Manual (Page 40)

Promi-SD User Manual – Appendix A. AT Commands A-4
Copyright © 2006 Sena Technologies, Inc. All rights reserved.
Command Description
1 ATZ

SD Response  OK
Purpose Software Reset
Description This is the same effect as power off and on.
This command disconnects Bluetooth device, and stops ongoing task. After rebooting,
the status is decided by the preset operation mode.
Some AT commands need ATZ to take effect.
Reference AT&F, AT+BTCSD, AT+UARTCONFIG
2 AT&F 
SD Response  OK
Purpose Hardware reset
Description This is the same effect as initialization by reset button.
All parameters are initialized to factory defaults. The storage of Promi-SD is cleared
completely.
Reference ATZ
3 AT

SD Response  OK
Purpose Check the connection status with host equipment
Description Check if the connection to host equipment is normal. The serial parameters of Promi-SD
must be same as those of host equipment. If not, SD response is none or ‘ERROR’ or
abnormal sequence of strings.
Reference AT+UARTCONFIG, ATZ, AT&F
4 AT+UARTCONFIG,Baudrate,Parity,Stopbit,Hwfc (SD101/202) 
AT+UARTCONFIG,Baudrate,Parity,Stopbit (SD205)
SD Response  OK
Purpose Set Serial parameters
Parameters Baudrate=1200/2400/9600/14400/19200/38400/57600/115200/230400 (Default=9600)
Parity=N/E/O (Default=N)
Stopbit=1/2 (Default=1)
Hwfc(Hardware Flow Control)=0/1 (Default=1) (Only SD101/202)
* SD205 use dipswitch.
Description The Serial parameters can be set or changed. The factory default is 9600, N, 1.
To take effect of this command, ATZ or power off and on.
Reference AT, ATZ, AT&F, ATS